Mixing graphene—a material made of single-atom-thick layers of carbon—with homemade “Silly Putty” produces a sensor so sensitive that it can detect the tiny footsteps of spiders, according to new research.

Donald Trump’s plans to tackle the opioid crisis are taking on new urgency as deaths from the drugs are rising sharply, particularly in many of the areas that made up the base of the president-elect’s support.

When it comes to saving for health-care costs in retirement, women need to set aside more—almost 20% more, on average—to cover their medical bills in the final years of their lives, according to a survey released Wednesday.

The number of mumps cases has nearly tripled in 2016, making it the worst year for outbreaks in a decade. Despite widespread vaccination requirements, college campuses are bearing the brunt of the attack.

As Republicans gear up to overhaul the federal health law, they face pushback from a couple unexpected corners on one of their goals: Giving health insurers greater ability to sell policies to consumers across state lines.

Former New York City mayor and billionaire philanthropist Michael Bloomberg has spent hundreds of millions of dollars of his fortune over the past decade fighting tobacco use in the developing world. Now, with cigarette use declining globally, he is deepening his campaign.